课文填空（每小题0.5分，满分5分）
James’s grandpa is 82 years old but he is still fit enough to cycle 20 kilos. The following is his experience of smoking as well as his advice to James.
“Believe me how easy it is to begin smoking and how ① t________ it is to stop, because you can become ②_________ in three different ways. First ③___________, which means after a while , your body becomes accustomed to having nicotine. Second , you can become dependent on it through ④_______. As we know if we do the same thing over and over again, you begin to do it ⑤_________. Lastly , ⑥_________, you will feel happier and more relaxed after having a cigarette.
“When I was young, I didn’t know much about the harmful ⑦_________ of smoking. I don’t know it could do damage to our lung and heart . Nor did I know the baby may be ⑧ a_________ in some way. But I did know I smelt ⑨________ and become breathless quickly. I didn’t realize I had to ⑩_________ smoking until I was taken off the school football team. “